| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| /* |
| * $Id: ElemFallback.java 468643 2006-10-28 06:56:03Z minchau $ |
| */ |
| package org.apache.xalan.templates; |
| |
| import javax.xml.transform.TransformerException; |
| |
| import org.apache.xalan.transformer.TransformerImpl; |
| |
| /** |
| * Implement xsl:fallback. |
| * <pre> |
| * <!ELEMENT xsl:fallback %template;> |
| * <!ATTLIST xsl:fallback %space-att;> |
| * </pre> |
| * @see <a href="http://www.w3.org/TR/xslt#fallback">fallback in XSLT Specification</a> |
| * @xsl.usage advanced |
| */ |
| public class ElemFallback extends ElemTemplateElement |
| { |
| static final long serialVersionUID = 1782962139867340703L; |
| |
| /** |
| * Get an int constant identifying the type of element. |
| * @see org.apache.xalan.templates.Constants |
| * |
| * @return The token ID for this element |
| */ |
| public int getXSLToken() |
| { |
| return Constants.ELEMNAME_FALLBACK; |
| } |
| |
| /** |
| * Return the node name. |
| * |
| * @return The Element's name |
| */ |
| public String getNodeName() |
| { |
| return Constants.ELEMNAME_FALLBACK_STRING; |
| } |
| |
| /** |
| * This is the normal call when xsl:fallback is instantiated. |
| * In accordance with the XSLT 1.0 Recommendation, chapter 15, |
| * "Normally, instantiating an xsl:fallback element does nothing." |
| * |
| * @param transformer non-null reference to the the current transform-time state. |
| * |
| * @throws TransformerException |
| */ |
| public void execute( |
| TransformerImpl transformer) |
| throws TransformerException |
| { |
| } |
| |
| /** |
| * Execute the fallback elements. This must be explicitly called to |
| * instantiate the content of an xsl:fallback element. |
| * When an XSLT transformer performs fallback for an instruction |
| * element, if the instruction element has one or more xsl:fallback |
| * children, then the content of each of the xsl:fallback children |
| * must be instantiated in sequence; otherwise, an error must |
| * be signaled. The content of an xsl:fallback element is a template. |
| * |
| * @param transformer non-null reference to the the current transform-time state. |
| * |
| * @throws TransformerException |
| */ |
| public void executeFallback( |
| TransformerImpl transformer) |
| throws TransformerException |
| { |
| |
| int parentElemType = m_parentNode.getXSLToken(); |
| if (Constants.ELEMNAME_EXTENSIONCALL == parentElemType |
| || Constants.ELEMNAME_UNDEFINED == parentElemType) |
| { |
| |
| transformer.executeChildTemplates(this, true); |
| |
| } |
| else |
| { |
| |
| // Should never happen |
| System.out.println( |
| "Error! parent of xsl:fallback must be an extension or unknown element!"); |
| } |
| } |
| } |